TWI608153B - Construction method for cylindrical tank - Google Patents

Description

Construction method of cylindrical groove

The present invention relates to a method of constructing a cylindrical groove.

The present application claims priority based on Japanese Patent Application No. 2014-234542, filed on Jan.

A cylindrical tank having a double-shell structure having an inner tank and an outer tank is used for storage of a cryogenic liquid such as LNG (liquefied natural gas) or LPG (liquefied petroleum gas). In the patent document 1 (JP-A-2012-149416), a construction method of a cylindrical groove having a metal inner groove and a concrete outer groove has been disclosed.

Patent Document 1 discloses a method of simultaneously constructing an inner groove and an outer groove in order to shorten the cycle time of the cylindrical groove. Specifically, the gantry is disposed along the inner circumferential surface of the lower layer of the outer tank, and then alternately repeated on the gantry: the rise of the inner groove side plate caused by the jack up device, and the next inner groove The side plates are welded to the lower side of the raised inner groove side plates, and the inner grooves are assembled. Further, the outer tank is also carried out in parallel with the assembly of the inner tank, and is constructed in order from the uppermost layer to the lowermost layer.

In the technique of the aforementioned Patent Document 1, it is by lifting When the inner groove side plate is raised by the device, the inner groove roof of the joint plate (joint portion) attached to the innermost groove side plate of the uppermost layer is lifted together, and the inner groove side plate which is the next layer is raised in order. The lower end of the inner groove side plate. However, in such a step, when an inner tank roof or the like is suspended by the lifting device, and an earthquake or strong wind or the like occurs during the period in which the rise is stopped, the inner tank roof or the like is largely displaced in the horizontal direction in the outer tank. possibility. Further, even if it is not strong wind, the roof of the inner tank or the like is still oscillated in the outer tank by the wind, and there is a case where the shaking of the inner tank roof or the like causes one of the stability of the damage engineering.

That is, since the mounting portion of the lifting device in the roof of the inner tank protrudes toward the outside (for example, the radially outer side), the mounting portion collides with the inner peripheral surface of the outer groove with the shaking of the inner groove roof, and is damaged. possibility. Moreover, it may be shaken greatly during an earthquake or strong wind, whereby the inner trough roof is damaged, or the outer trough is damaged due to the concentrated load of the mounting portion.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a method for preventing a roof of an inner tank from being horizontal due to the influence of wind or the like while lifting the roof of the inner tank by the lifting device. A method of constructing a cylindrical groove that is in a bad condition in the direction of shaking and improves the stability of the project.

According to a first aspect of the present invention, there is provided a method of constructing a cylindrical groove having an inner groove and an outer groove, the cylindrical groove being constructed by assembling a joint of an annular joint on the inner side of the outer groove Assembly step; a joint support setting step of providing a plurality of joint supports in the circumferential direction of the joint portion; enabling the telescopic support jack and the side wall of the outer groove a supporting jack setting step provided to the joint support member; and lifting the joint portion by a plurality of lifting devices to raise it, and attaching the inner groove side plate to the lower side of the raised joint portion to be assembled The inner tank assembly step of the tank. Further, in the inner groove assembling step, when the joint portion is lifted and raised, the support jack is elongated to support between the side wall of the outer groove and the joint support member, and the joint portion is fixed to the outer groove. Side wall.

According to a second aspect of the present invention, there is provided a method of constructing a cylindrical groove according to the first aspect, wherein in the joint support setting step, each joint support member is provided to be suspended by the lifting device. Hanging part. Further, in the method of constructing the cylindrical groove according to the first aspect, before the step of assembling the inner tank, the plurality of lifting devices are attached to the hanging portion, and the lifting device is coupled to the suspended portion. And the step of disposing the suspension portion on the side wall of the outer groove and suspending the lifting device.

According to a third aspect of the present invention, there is provided a method of constructing a cylindrical groove according to the first or second aspect, wherein in the supporting jack setting step, a support type is provided for each of the plurality of joint supports. jack.

According to a fourth aspect of the present invention, there is provided a method of constructing a cylindrical groove according to any one of the first to third aspects, wherein in the step of assembling the joint portion, the assembly is formed into an annular shape in advance. The joint portion is attached and assembled on the upper side of the inner groove side plate; in the inner groove assembling step, the inner groove side plate is attached to the inner groove side plate on the lower side of the joint portion which is raised by the plurality of lifting devices.

According to a fifth aspect of the present invention, there is provided a method of constructing a cylindrical groove according to any one of the first to fourth aspects, wherein the inner groove group Before the step of loading, there is further provided a step of providing a spacer member protruding from the joint support member toward the radially outer side of the groove between adjacent joint supports of the outer peripheral surface of the joint portion.

According to the method of constructing the cylindrical groove of the present invention, since the joint portion is lifted by the lifting device, and the roof of the inner groove is suspended, the supporting jack is elongated and supported on the side wall and the joint of the outer groove. Supporting between the pieces and fixing the joint portion to the side wall of the outer groove prevents the joint portion or the inner groove roof from being shaken horizontally by the influence of earthquake or wind. Thereby, it is possible to surely prevent the malfunction of the so-called inner tank roof or the outer tank from being damaged.

Further, since the roof of the inner tank or the like is prevented from being shaken in the horizontal direction, the stability of the project can be improved.

1‧‧‧ Basic version (bottom of the outer trough)

2‧‧‧Internal groove anchor

3‧‧‧ Sidewall (PC wall)

4‧‧‧Works

5‧‧‧Overhanging platform

6‧‧‧With foot stand (door type stand)

7‧‧‧Inch side panel

8‧‧‧ Roof rack

9‧‧‧ joint plate (joint part)

10‧‧‧ Joint support (joint reinforcement)

10a‧‧‧Support board

10b‧‧‧ Suspended plate (suspended part)

10c‧‧‧ reinforcing plate

10d‧‧‧ gap (suspended point)

10e‧‧‧ ribs

11‧‧‧ interval holder

11a‧‧‧H-beam

11b‧‧‧ steel plate

12‧‧‧ Roof skeleton

13‧‧‧ cable car track

14‧‧‧Inch roof

16‧‧‧Rings

16a‧‧‧ring plate

17‧‧‧Steps for lifting devices

18‧‧‧suspension platform (suspension)

19‧‧‧ Lifting device

19a‧‧‧ nuts

20‧‧‧ Lifting pole

20a‧‧‧ jack body

20b‧‧‧ pole

21‧‧‧hanging scales

21a‧‧‧Libra Bar

21b‧‧‧ hammer

22‧‧‧Bottom anti-cold heat absorbing material

23a, 23b‧‧‧ Perlite concrete blocks

24‧‧‧Lightweight concrete blocks for construction

25‧‧‧2nd suspension stand

26‧‧‧Outer trough roof

27‧‧‧ Materials

28‧‧‧Working platform

50‧‧‧Supported jack

51‧‧‧Support

52‧‧‧ jack handle

52a‧‧‧ Male thread department

53‧‧‧piles end

54‧‧‧ spacers

100‧‧‧Cylinder groove

X‧‧‧ring area

Y‧‧‧ trough components

Fig. 1 is a longitudinal sectional view showing a groove in the construction of a method for constructing a cylindrical groove in an embodiment of the present invention.

Fig. 2 is a longitudinal sectional view showing a groove in the construction of a method for constructing a cylindrical groove in an embodiment of the present invention.

Fig. 3 is a longitudinal sectional view showing a groove in the construction of a method for constructing a cylindrical groove in an embodiment of the present invention.

Fig. 4 is a longitudinal sectional view showing the main part of the groove for explaining the mounting state of the joint support member, the support jack, and the space keeper.

Figure 5 is used to illustrate the joint support, support jack and spacing A top view of a main portion of the groove in which the retaining member is mounted.

Fig. 6 is a plan view showing the roof of the joint support member, the support jack, and the spacer member including the outer tank roof skeleton.

Fig. 7 is a perspective view showing a schematic configuration of a support jack.

Fig. 8 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 9 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 10 is a longitudinal cross-sectional view showing the main part of a groove for explaining a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 11 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 12 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 13 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 14 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 15 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 16 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 17 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 18 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Fig. 19 is a longitudinal sectional view showing a groove in the construction of a member method of a cylindrical groove in an embodiment of the present invention.

Hereinafter, an embodiment of a method for constructing a cylindrical groove according to the present invention will be described in detail with reference to the drawings. Further, in the following drawings, in order to form the size of each member, the scale of each member is appropriately changed. In the following description, a above-ground PC (prestressed concrete) double-shell tank in which LNG is stored is exemplified as a cylindrical tank. The inner groove of the cylindrical groove of the present embodiment is made of metal, and the outer groove is made of concrete (pre-stress concrete).

First, as shown in Fig. 1, a substantially circular plate-shaped base plate 1 (bottom of the outer groove) is formed, and a bottom liner (not shown) is formed on the base plate. At this time, in the present embodiment, the inner groove anchor 2 is provided in the circumferential direction of the base plate 1 so as to be closer to the inner side than the outer peripheral portion of the base plate 1.

Next, the outer peripheral portion of the base plate 1 is closer to the outer side than the inner groove anchor 2, and a portion of the side wall 3 (PC wall) of the outer groove, for example, the fifth layer of the side wall 3 formed by stacking nine layers is formed (for example) #5).

Further, in one of the side walls 3 (PC walls) of the outer tank formed here, the work opening 4 is formed from the lower layer side, for example, and the second layer to the third layer. Moreover, since the side walls of the remaining layers are piled up over a portion of the side wall 3 and finally the side walls 3 composed of nine layers are formed, In advance, on the upper side of one of the side walls 3, for example, the fourth layer or more, a hanging step 5 for assembling the mold box for the remaining layer or the like is provided.

In this manner, after forming one portion of the side wall 3 of the outer groove, a plurality of leg stand units 6 for assembling the inner groove side plates are provided on the inner circumferential side of the side wall 3 along the circumferential direction thereof. The leg stand 6 is a door type stand for supporting an inner groove side plate to be described later. The beading stand 6 is placed on the base plate 1 so as to span the annular region X of the region in which the cylindrical inner groove formed by combining the plurality of inner groove side plates is finally discharged.

Next, as shown in Fig. 2, concrete is partially poured into one of the side walls 3 to form a side wall of the sixth layer (#6). Further, in the construction of the side wall 3, the hanging step 5 is sequentially moved toward the upper side in order to sequentially form the upper side thereof.

In parallel with this, on the foot stand 6, a plurality of inner groove side plates 7 which are a part of the side walls of the inner grooves are vertically arranged along the circumferential direction of the side wall 3, and the laterally adjacent inner groove side plates 7 are integrally welded. Thereby, a plurality of inner groove side plates 7 are assembled into an annular shape. In addition, the inner groove side plate 7 to be assembled is the uppermost layer of the inner groove (the ninth layer (#9) in the present embodiment) (hereinafter, the case of the innermost groove side plate 7 of the uppermost layer) . The inner groove side plate 7 is formed of a nickel (Ni) steel material or the like having excellent toughness and strength.

Further, inside the side wall 3, the roof frame 8 is assembled in the center portion of the base plate 1.

Next, as shown in Fig. 3, the plates of the joint plate (joint portion) 9 are attached to the inner side of the side wall 3 of the outer tub at the upper end portion of the innermost groove side plate 7, thereby assembling the joint plate. 9 and this is attached to the upper end of the inner groove side plate 7. The joint plate 9 is formed so as to be bent downward in the outer peripheral portion of the inner groove roof to be described later, and the upper end portion of the innermost groove side plate 7 of the uppermost layer is connected to the lower end portion as described above. That is, the joint plate 9 is curved so as to protrude outward in the radial direction of the groove in a longitudinal cross-sectional view.

As shown in FIGS. 4 to 6, a joint support 10 (joint reinforcing material) is attached to the outer peripheral surface of the joint plate 9. As shown in Fig. 6, in the present embodiment, a plurality of (e.g., 30) joint supports 10 are disposed at equal intervals along the circumferential direction of the joint plate 9. Further, in the present embodiment, one spacer member 11 is provided between the joint supports 10 adjacent in the circumferential direction. In addition, in Fig. 6, reference numeral 12 denotes a roof skeleton of an outer tank roof to be described later, and reference numeral 13 denotes a gondola rail. In addition, in the sixth drawing, the description of the support type jack 50 which will be described later is omitted.

The joint support 10 is a steel plate member for forming a suspended portion connected to a lifting device to be described later, and as shown in FIGS. 4 and 5, has a member formed by a triangular shape formed in a side view. a pair of support plates 10a having a shape; a suspended plate 10b (suspended portion) having a substantially square shape in a plan view between the support plates 10a; and being sandwiched between the support plates 10a and connected to each other The upper side of the suspension plate 10b reinforces the reinforcing plate 10c between the support plate 10a and the suspended plate 10b. A pair of support plates 10a are adjacent to each other in the circumferential direction of the joint plate 9.

As shown in Fig. 4, the support plate 10a is joined to the joint plate 9 by a side portion formed by bending the curved shape corresponding to the joint plate 9. The curved surface is bent and attached and fixed by welding or the like. When the suspension plate 10b and the reinforcing plate 10c are coupled to each other by welding, as shown in Fig. 5, they are attached and fixed between the support plates 10a by welding or screwing. The suspended plate 10b is fixed between the pair of support plates 10a in a state where the outer end (the end portion of the side wall 3) is aligned with the outer end of the support plate 10a.

On the side opposite to the joint plate 9 of the suspended plate 10b, a notch 10d that opens toward the side wall 3 of the outer groove is formed. The notch 10d is a suspended point that is connected to a lifting device to be described later. Therefore, the suspended panel 10b having such a notch 10d is formed as a suspended portion in the present invention. Further, ribs 10e having a triangular shape viewed from the side are provided on both sides (both sides in the circumferential direction) of the notches 10d. The rib 10e is integrally formed between the suspended plate 10b and the reinforcing plate 10c.

Further, in the present embodiment, the support type jack 50 is attached to all of the joint support members 10. That is, the support jack 50 is disposed on each of the plurality of joint supports 10 in such a manner as to face the side walls 3 of the outer tub. The support jack 50 is formed by a conventionally known screw jack as shown in Fig. 7 showing a schematic view of the schematic configuration. The screw jack is a device that adjusts the length dimension of the pressed strut by its own expansion and contraction, and presses the object. The support type jack 50 has a pair of support portions 51 that are disposed to face each other, a jack handle 52 that is disposed between the support portions 51, and a pillar end portion 53 that is integrally provided on the outer side of each of the support portions 51, and is configured to be capable of Telescopic. That is, the supporting jack 50 generates a force for pulling apart two objects (the side wall 3 and the reinforcing plate 10c in the present embodiment) disposed on both sides (the both sides in the radial direction of the groove). Support).

A female screw portion is formed in the support portion 51, and a male screw portion 52a that is screwed to the female screw portion of the support portion 51 is formed at each end of the jack handle 52. The male screw portions 52a cut the threads in directions opposite to each other. Further, the female screw portion of the support portion 51 that is screwed to the male screw portion 52a is also threaded so as to be opposite to each other between the pair of support portions 51.

With the configuration as described above, the support jack 50 (spiral jack) is configured such that the pair of support portions 51 are separated from each other by the rotation of the jack handle 52 toward one side and the leg end portion 53 is elongated, and by the jack handle 52 Rotation to the other side brings the pair of support portions 51 closer together and shortens the space between the post ends 53. That is, the support force can be exerted by rotating the jack handle 52 toward one side, and shortened to release the supporting force by rotating the jack handle 52 toward the other side.

Further, in the present embodiment, the support type jack 50 is attached and fixed to the joint support 10. That is, as shown in Figs. 5 and 7, the suspension plate 10b of the joint support 10 is disposed between the support plate 10a on one side of the notch 10d and the rib 10e. Further, one of the pillar end portions 53 can be fixed to the reinforcing plate 10c by welding or the like. Thereby, the other pillar end portion 53 is opposed to the side wall 3 of the outer tub, and protrudes slightly outward from the outer end (short in the radial direction) of the suspension plate 10b even in a shortened state. Therefore, as will be described later, when the joint plate 9 is lifted and raised in the step of assembling the inner groove, the support jack 50 can be extended by rotating the jack handle 52 toward one side, and the other side can be made The strut end portion 53 abuts against the side wall 3 of the outer trough. That is, the support jack 50 can be supported between the side wall 3 and the joint support 10 (the reinforcing plate 10c). Further, when the support jack 50 is attached or fixed to the joint support 10, a spacer 54 such as a wood piece may be provided between the suspended panel 10b and the support jack 50 as needed.

The spacer member 11 is provided on the outer peripheral surface of the joint plate 9 so as to protrude outward (the outer side in the radial direction of the groove) of the joint support member 10, and is disposed along the sixth embodiment as shown in FIG. The circumferential direction of the articular plate 9 is between the plurality of joint supports 10, that is, between the adjacent joint supports 10, at equal intervals. The spacers 11 are disposed at substantially intermediate portions between adjacent joint supports 10, whereby a plurality of spacers 11 can be disposed at equal intervals along the circumferential direction of the joint plate 9. Therefore, the spacer holder 11 and the joint support 10 can be alternately arranged at equal intervals to each other along the circumferential direction of the joint plate 9, and thus the support jack 50 and the spacer holder 11 provided to the joint support 10 are also along the joint The plates 9 are alternately arranged in the circumferential direction.

As shown in Fig. 5, for example, such a spacer 11 is formed by a pair of steel plates (not shown) attached to the joint plate 9 in the same manner as the support plate 10a described above; An H-shaped steel 11a between the steel sheets; and a steel sheet 11b attached to the outer end surface of the H-shaped steel 11a. Further, in the present embodiment, the spacer member 11 is formed and arranged such that the distance from the center of the joint plate 9 to the outer side end of the spacer member 11 is larger than the distance from the center of the joint plate 9 to the above-mentioned suspended portion. The distance from the outer side end of the suspension plate 10b is also long.

That is, the outer end of the suspended panel 10b forming the suspended portion is disposed so as to be positioned on the substantially circumference (on the same circumference) of a circle which is concentric with the joint plate 9. On the other hand, the outer side end of the spacer member 11 is disposed so as to be positioned around a circle having a diameter slightly larger than that formed by the outer side end of the suspension plate 10b. For example, the outer end of the spacer member 11 is tied around the circumference of the circle formed by the outer end of the support jack 50 (the outer end of the other pillar end 53) at the time of shortening.

By the way, as described later, the joint plate 9 is largely displaced in the horizontal direction due to the influence of an earthquake or the like while the joint plate 9 is being lifted by the lifting device (in the ascending movement), and the support type is provided. The jack 50 collides against the side wall 3, and still collides with the side wall 3 of the outer groove together with the supporting jack 50, so that the load at the time of collision can be dispersed, and the damage of the supporting jack 50 or the damage of the side wall 3 can be prevented. . Further, since the supporting jacks 50 or the spacers 11 collide against the side walls 3 of the outer tubs earlier than the joint supporting members 10 (suspended panels 10b) as the suspended portions, the joint support 10 can be prevented from being damaged. Or the joint plate 9 is damaged.

In addition, as for the spacer member 11, the outer end position may not be on the circumference of the circle substantially the same as the circle formed by the outer side end when the support jack 50 is shortened, but may be located on the suspended panel 10b. The circle formed by the outer end is substantially around the circumference of the same circle. That is, the spacer member 11 may be disposed in the radial direction of the groove and at the same position as the joint support member 10 (the suspended plate 10b). More specifically, the outer side end of the spacer member 11 may be disposed in the groove. Radial and at the same position as the outer side end of the suspended plate 10b. In the In this case, when the supporting jack 50 is damaged by the impact of an earthquake or the like against the side wall 3, and the joint support member 10 collides against the side wall 3 of the outer groove, the spacer member 11 also collides with the joint support member 10 against the side wall of the outer groove. 3. Therefore, the load at the time of collision can be dispersed.

Next, as shown in Fig. 8, the inner tank roof block is mounted on the roof gantry 8, and the inner tank roof 14 (slot roof portion) is assembled, and the assembled inner tank roof 14 is attached to the joint plate 9. In addition, in FIGS. 8 to 18, the description of the above-described support type jack 50 is omitted.

Further, a high-level work vehicle (not shown) is driven into the base plate 1. Further, in order to form the annular portion 16 in the annular region X below the beacon stand 6, one portion of the annular portion 16 is constructed. Further, the side walls 3 of the outer tub are sequentially stacked toward the upper side, and the side walls 3 of the outer tub are applied until the ninth layer (#9) which is the final layer. In addition, at this point of time, the overhanging table 5 for forming the side wall 3 is retained in a state of being grouped up to, for example, the sixth layer to the seventh layer or more.

Next, as shown in Fig. 9, the lift device 17 is assembled to the joint plate 9 in a state of being pulled away from the inner peripheral surface of the side wall 3 of the outer tub and without interfering with the height of the overhanging table 5. . The step 17 for the lifting device is formed in a ring shape along the circumferential direction of the annular joint plate 9 to prevent tilting in the radial direction. Further, in this assembly, the joint support 10 is supported by substantially the entire lift table 17 and a tilting prevention material (not shown) is provided between the joint plate 9 or the inner groove roof 14 This is to form the step 17 for the lifting device in a state in which it is fixed to the joint plate 9 or the inner groove roof 14. As shown in Figure 9, in this implementation In the form, the fourth layer (#4) to the fifth layer (#5) of the side wall 3 of the outer tub are substantially opposed to each other, and the step 17 for the lifting device is assembled.

In addition, in the present embodiment, the lifting stand 18 is provided with a plurality of predetermined positions on the side wall 3 so that the hanging frame 18 (suspension portion) is equally spaced in the circumferential direction of the side wall 3, and is the fifth in the present embodiment. Layer (#5). In other words, the suspension frame 18 can be firmly and detachably locked and fixed to, for example, an anchor plate or the like which has been embedded in the side wall 3 in advance, and protrudes substantially horizontally from the side wall 3 toward the inside thereof.

Next, a lifting device 19 is mounted between the suspension frame 18 and the suspended plate 10b of the joint support 10. That is, the lifting device 19 connected to the joint plate 9 and having the lifter 20 described later is attached to the suspension stand 18 provided on the side wall 3 of the outer tub. The lifting device 19 is coupled to the suspended panel 10b. As shown in Fig. 10, the lifting device 19 is configured as a center hole jack and has the following members: a jack body 20a that is engaged and supported by the suspension frame 18; and an upper end portion that is attached to the jack body 20a. The lower end portion is attached to the lift rod 20 of the suspended plate 10b of the joint support member 10; and the nut 19a for attaching the lower end portion of the lift rod 20 to the suspended plate 10b. A male thread portion for screwing the nut 19a is formed at the lower end portion of the lift lever 20. In addition, in FIG. 10, in order to explain the lifting device 19, the description of the lifting device step 17 is omitted.

The lifting device 19 is mounted such that the lifting rod 20 is suspended from the jack body 20a in a state in which the jack body 20a is engaged and fixed above the suspension frame 18, and the lower end portion of the lifting rod 20 is inserted. The inside of the notch 10d of the suspended plate 10b of the joint plate 10 is inside. and, The lower end portion of the lift lever 20 is fixed to the suspended panel 10b by a nut 19a which has been prepared in advance.

In this manner, a plurality of lifting devices 19 are provided at predetermined intervals in the circumferential direction of the side wall 3 of the outer tub, and then connected to the suspended panels 10b of the joint support 10, respectively, and as shown in Fig. 9, the roof rack 8 is removed. When the roof frame 8 is removed, the groove constituting members (the innermost groove side plate 7, the joint plate 9, the joint support 10, the inner groove roof 14, the support jack 50, the spacer holder 11, and the lifting device step 17) The weight is maintained in a state that can be maintained by a plurality of lifting devices 19.

As shown in Fig. 9, the position provided by the suspension stand 18 is the fifth layer (#5) of the side wall 3, and the position of the joint support 10 is set to be the third layer (#3) of the side wall 3. In the position of the orientation, the lifter 20 is formed to have a length equal to or greater than the distance between the two. However, as will be described later, the lift lever 20 of such a length is formed such that when the lift device 19 is actuated and the lift lever 20 is raised, the lift lever 20 interferes with the overhanging table 5 located directly above it. Happening.

As shown in Fig. 10, the lift lever 20 is formed by connecting a plurality of rods 20b in the longitudinal direction, and these are detachably supported by fixing screws or the like. Therefore, when the lift lever 20 is raised, the rod 20b that protrudes upward from the suspension stand 18 can be cut away from the lower rod 20b, thereby preventing the lift lever 20 from interfering with the suspension step 5. Further, reference numeral 21 in Fig. 9 shows a hanging balance for suspending or suspending each of the constituent members of the above-described lifting device 19, or for suspending the cut-off lever 20b, the hanging balance 21 A male hammer 21b is provided at one end of the balance bar 21a. Know the components. The suspension balance 21 can be suspended by a crane (not shown), thereby controlling each movement of the lifting or horizontal movement.

Further, in such a step, the cold storage project of the annular portion 16 and the cold preservation project of the central portion of the base plate 1 are performed in parallel on the base plate 1. As shown in Fig. 10, the cold preservation engineering of the annular portion 16 is to assemble the perlite concrete block 23a, the perlite concrete block 23b, and the lightweight concrete block 24 for construction to the bottom resistance by the lower side of the foot stand 6. The upper and lower sides of the hot and cold absorbing material 22 are mounted with the annular plate 16a mounted thereon. The annular portion 16 is a portion that finally supports the assembled inner groove side plate 7, and the annular plate 16a is formed thick, and even the cold-preserving structure is formed of a hard material such as a concrete block.

Next, as shown in Fig. 11, the joint plate 9 is lifted by the lifting device 19, and the groove constituting member Y includes the joint plate 9 and the inner portion supported by the joint plate 9. The trough roof 14, the inner trough side panel 7, the joint support 10, the support jack 50, the spacer holder 11, and the step 17 for the lifting device. Specifically, the lift lever 20 is raised by driving the jack body 20a in the normal rotation direction, and the groove forming member Y in the middle of assembly is lifted together with the joint support 10.

The joint plate 9 lifted by the lifting device 19 is a member for connecting the inner groove roof 14 and the inner groove side plate 7, and the plate thickness is sufficiently thicker than the inner groove side plate 7, and the strength is high, so even The deformation of the joint plate 9 or the like can be prevented by adding the weight including the inner groove side plate 7 or the inner groove roof 14 and further the lifting device step 17.

Having the joint plate 9 and being supported by the joint plate 9 The groove forming member Y of the groove roof 14 or the like is raised (suspended) by the lifting device 19 by a substantially one-layer amount of the inner groove side plate 7, and then the rotation of the joint support member is stopped after the lifting by the lifting device 19 is stopped. The jack handle 52 of the support jack 50 shown in Fig. 7 is mounted on the 10, and the support jack 50 is extended to abut the other leg end portion 53 against the side wall 3 of the outer groove. Thereby, the support jack 50 is tensioned between the side wall 3 and the joint plate 9 through the joint support 10. At this time, it is preferable to provide a spacer such as a wood piece between the side wall 3 and the other pillar end portion 53 as needed, thereby preventing the concrete side wall 3 from being injured.

Thus, by abutting and tensioning the pillar end portions 53 of all the support jacks 50 to the side walls 3, the annular joint plates 9 and the entire circumference can be made through the support jacks 50 and the joint support members 10. The support is fixed to the inner surface of the side wall 3 of the outer groove.

Therefore, in the subsequent steps, it is possible to prevent the joint plate 9 or the inner groove roof 14 from being shaken in the horizontal direction by the influence of earthquake or wind. Therefore, since the joint plate 9 or the inner groove roof 14 or the like does not swing in the horizontal direction in the subsequent steps, the work can be performed stably.

Further, in a state in which the pillar end portions 53 of all the support jacks 50 are abutted against the side walls 3, the spacers 11 can be maintained to face each other with the outer side ends facing the side walls 3 at predetermined intervals. status.

Next, the space formed below the inner groove side plate 7 is carried into the next inner groove side plate 7. The loading of the inner tank side plate 7 is performed through the work opening 4 provided in the side wall 3. A first conveying device (not shown) is provided around the work opening 4, and can be passed from the side wall 3 by the conveying device. The inner tank side plate 7 is sequentially conveyed to the foot stand 6 in the work opening 4. Further, a second conveying device (not shown) is provided on the leg stand 6 in the circumferential direction of the side wall 3. The second conveying device is formed by a rail (not shown) along the circumferential direction of the side wall 3, and the inner groove side plate 7 conveyed to the bead frame 6 is further directed toward the circumference of the side wall 3. The directions are carried in order.

Next, the inner tank side plate 7 conveyed by the second conveyance device is vertically erected on the bead stand 6, and is disposed in an annular shape below the raised inner groove side plate 7. Further, as shown in Fig. 12, the inner groove side plates 7 which are conveyed and are adjacent in the lateral direction are integrally welded, and the inner groove side plates 7 which are vertically arranged are integrally welded, whereby the inner groove side plates 7 are integrally formed into a circle. Cylindrical. That is, the inner side groove side plate 7 of the eighth layer (#8) is attached below the inner side groove 7 of the ninth layer (#9) which is the uppermost layer.

Further, a plurality of inner groove side plates 7 may be laterally joined in addition to the side walls 3 of the outer tub, and after the inner side wall 3 is taken into the inner side wall 3 and formed into a ring shape, the inner groove side plates 7 arranged in the upper and lower directions are welded. As described above, by connecting a plurality of the inner-groove side plates 7 outside the side wall 3 having a small work space restriction, the welding work can be easily performed, and the inner grooves can be assembled efficiently.

When the jacking operation is performed as described above, the lifting device 19 causes the upper end of the lifting rod 20 to protrude upward from the hanging frame 18 as shown in Fig. 12, and when it is further raised, It is in a state of the suspension table 5 in which the interference position is directly above. Therefore, during the welding or the like of the inner groove side plate 7, the rod 20b which protrudes upward from the suspension frame 18 among the plurality of rods 20b constituting the lift lever 20 is removed. Further, it is previously unloaded on the inner tank roof 14 by a suspension column (not shown) provided on the top of the lifting device step 17. The removal of the rod 20b is performed by the lift table 17 by the lifting device. Further, in the lift table for the lifting device 17, the upper side is sequentially removed by suspending the scale 21 so as not to interfere with the hanging table 5.

Next, the jack handle 52 of the support jack 50 shown in Fig. 7 is rotated to shorten the support jack 50, and the support end portion 53 is released from the top side of the outer groove 3 and tensioned. Thereby, the joint plate 9 (joint support 10) or the like is released and supported and fixed to the inner surface of the side wall 3.

Then, the lifting device 19 raises the groove forming member Y by a substantially one-layer amount of the inner groove side plate 7, and the space formed below the inner groove side plate 7 is further carried into the next inner groove side plate 7, and hereinafter, The case of the inner side groove 7 of the eighth layer (#8) described above is the same, and the inner side plate 7 of the seventh layer (#7) is attached as shown in Fig. 13. At this time, after the rise caused by the lifting device 19 is stopped, the support jack 50 is extended to abut the support end 53 of the support jack 50 against the side wall 3 of the outer groove. Further, when the rise caused by the lifting device 19 is restarted or the lowering is performed as described later, the supporting jack 50 is shortened to release the pillar end portion 53 of the supporting jack 50 to the side wall of the outer groove. 3's abutment and support. Further, the rod 20b that protrudes upward from the suspension stand 18 is removed, and is unloaded on the inner tank roof 14 by the above-described suspension column.

After the inner side groove 7 of the ninth layer (#9) to the seventh layer (#7) is attached to the joint plate 9, as shown in Fig. 14, the overhanging table 5 on the inner peripheral side of the side wall 3 is removed. . That is, since it has been during this period After a sufficient period of time, the side wall 3 of the outer tub is completed to the ninth layer (#) of the uppermost layer, so that the mold box or the like can be removed, so that the hanging step 5 on the inner peripheral side of the side wall 3 can be removed. Further, the overhanging table 5 on the outer peripheral side of the side wall 3 is directly removed because it is not removed in the subsequent step.

Next, as shown in Fig. 14, in order to move the lifting device 19 upward, a second suspension stand 25 is provided at the top of the side wall 3 of the outer tub. Further, the lifting device 19 provided on the suspension stand 18 is lowered to discharge the groove constituent member Y (including the eighth or seventh inner groove side plate 7) on the bead stand 6. At this time, as described above, the support jack 50 is shortened in advance to release the abutment and support of the other leg end portion 53 of the side wall 3 of the outer groove.

Next, the lifting lever 20 of the lifting device 19 shown in Fig. 10 is detached from the suspended plate 10b of the joint support 10 by means of a hanging balance 21 or a crane or the like. Further, the jack body 20a of the lifting device 19 is detached from the suspension stand 18.

Thereby, the lifting device 19 is detached from between the side wall 3 of the outer tub and the joint plate 9. Further, the suspension stand 18 is detached from the side wall 3.

Further, the jack body 20a of the lifting device 19 is attached to the second suspension stand 25 shown in Fig. 14. In addition, the rod 20b on the upper side of the lift lever 20 is detached from the inner tank roof 14 in order to avoid interference with the suspension step 5, but the overhanging table 5 on the inner peripheral side of the side wall 3 has been It is removed without interference with the lifting rod 20, so the rod 20b which has been previously unloaded on the inner tank roof 14 is again mounted on the lifting rod 20, and the lifting rod 20 is lengthened in advance. Further, as shown in Fig. 13, in the present embodiment, it is necessary to cause the lift lever 20 to hang from the ninth layer (#9) of the uppermost layer of the side wall 3 of the outer tub to the fifth layer (#5). Therefore, the preparatory rod 20b which has been prepared separately is added to adjust the lift lever 20 to a desired length.

In this manner, after the lift lever 20 is adjusted to a desired length, the lower end side thereof is again inserted into the aforementioned cutout 10d of the suspension plate 10b of the joint support 10. Further, the lower end portion of the lift lever 20 is fixed to the suspended panel 10b by the nut 19a. Thereby, the lifting device 19 can be moved to the upper side (that is, moved from the suspension stand 18 to the second suspension stand 25). Thus, after the lifting device 19 finishes the removal of the top of the side wall 3 of the outer tub, as shown in Fig. 14, the lifting device step 17 is removed.

Next, as shown in Fig. 15, the joint plate 9 is lifted by the lifting device 19 provided on the second suspension stand 25, and the groove forming member Y is raised by substantially one layer of the inner groove side plate 7. Further, all of the support jacks 50 that have been attached to the joint support 10 are extended, and the respective pillar end portions 53 are abutted and tensioned to the side walls 3 of the outer tub.

Then, the space formed below the inner groove side plate 7 is further carried into the next inner groove side plate 7, and is hereinafter referred to as the inner layer of the eighth layer (#8) and the seventh layer (#7) described above. In the same manner as in the side panel 7, the inner side panel 7 of the sixth layer (#6) is attached as shown in Fig. 16.

Next, the outer groove roof 26 is attached to the inner groove roof 14 in a state where the joint plate 9 or the like is supported by the support jack 10 on the inner surface of the side wall 3 of the outer groove. The installation of such an outer trough roof 26 is A connecting material (not shown) composed of a plurality of channel steels or the like is attached to the inner tank roof 14, and the outer tank roof 26 is attached to the connecting materials.

Further, the inner peripheral surface of the side wall 3 of the outer tub is started to be attached with a side spacer (not shown).

Hereinafter, the rise of the groove constituent member Y by the lifting device 19 and the abutment of the support end portion 53 against the side wall 3 by the extension of the support jack 50 and the next inner portion are respectively repeated. The loading of the groove side plate 7 to the lower side of the inner groove side plate 7 (the groove forming member Y), the mounting of the inserted inner groove side plate 7 to the groove forming member Y (the inner groove side plate 7), and the shortening of the supporting jack 50 The resulting pillar end portion 53 is released from the abutment of the side wall 3, and as shown in Fig. 17, the inner groove side plate 7 is attached to the first layer (#1) of the lowermost layer. Thereby, the side wall of the inner tank is completed.

In addition, when the groove side plate 7 is attached to each of the layers, that is, while the groove constituting member Y is hoisted and a space is formed below the groove, the various materials 27 are separately different from the insertion of the inner groove side plate 7. It is carried into the base plate 1 in the side wall 3. Further, the work platform 28 is assembled in advance above the outer tank roof 26.

Next, as shown in Fig. 18, the leg stand 6 is removed, thereby forming a space below the groove constituting member Y. At this time, the support jack 50 is elongated to cause the strut end portion 53 to abut against and be tensioned to the side wall 3 in advance.

Thereafter, the support jack 50 is shortened to release the abutment of the strut end portion 53 against the side wall 3. Further, the groove forming member Y is lowered by the lifting device 19, and the outer peripheral end of the roof frame 12 of the outer groove roof 26 is joined and fixed to the mounting end of the top inner peripheral surface of the side wall 3 which is embedded in the outer groove (not shown). Show). Further, at this point of time, the lower end portion of the lowermost layer of the inner groove side plate 7 is not in contact with the annular portion 16.

Next, the connecting material (not shown) for connecting between the outer tank roof 26 and the inner tank roof 14 is removed, and the connection between them is released.

Next, as shown in Fig. 19, the groove constituting member Y is further lowered by the lifting device 19, and the lower end portion of the lowermost layer of the inner groove side plate 7 is placed on the annular portion 16. Further, the inner groove anchor 2 provided in the base plate 1 is attached to the lowermost layer of the inner groove side plate 7.

Next, the support jack 50 and the joint support 10 are detached together from the joint plate 9, and the spacer holder 11 is further removed as needed.

Thereafter, the tensioning work of the side wall 3 of the outer tank is performed. Further, a side liner (not shown) that has been attached to the inner peripheral surface of the side wall 3 of the outer tub is blown with a polyurethane foam (PUF) as a heat-resistant and heat-resistant material. Further, the lifting device 19, the second suspension stand 25, and the like are also removed. Then, after the lock of the work opening 4 and the installation of a pump cylinder (not shown), the water is filled in the inner tank to perform a pressure resistance and airtight test.

Finally, a cold-preserving material (foam, not shown) such as perlite is filled between the inner tank and the outer tank to carry out the cold preservation between the inner and outer tanks, and the cylindrical tank 100 is constructed through the coating engineering and piping cooling engineering. .

According to the method of constructing the cylindrical groove of the present embodiment, when the joint plate 9 is lifted by the lifting device 19 and raised, and the side of the inner groove roof 14 is suspended, the support jack 50 is extended and placed in the outer groove. The side wall 3 is supported between the joint support 10 and the joint plate 9 is supported and fixed to the side wall 3 of the outer groove through the joint support 10. Therefore, it can be prevented The joint plate 9 or the inner groove roof 14 is shaken in the horizontal direction by the influence of earthquake or wind. Thereby, it is possible to surely prevent the so-called defective condition in which the inner tank roof 14 or the side wall 3 of the outer tank is damaged. Further, since the inner tank roof 14 and the like are prevented from shaking in the horizontal direction, the stability of the work can be improved.

Further, before the step of assembling the inner tub, there is a step of attaching a plurality of lifting devices 19 between the suspension frame 18 and the suspended panel 10b of the joint support member 10, the suspension frame 18 being disposed in the outer slot The side wall 3 is used to suspend the lifting device. Therefore, by providing the support jack 50 in the joint support 10 in advance, the joint support 10 by the support jack 50 can be performed when the joint support 10 is raised and stopped by the lifting device 19. Supporting, fixing and releasing the side wall 3 of the outer groove.

Moreover, since the support type jack 50 is provided on all of the plurality of joint support members 10, the joint support member 10 can be supported on the side wall 3 of the outer groove in the entire circumference, whereby the joint support member can be supported. The inner groove roof 14 or the like 10 or the upper portion thereof is fixed and fixed to a part of the circumferential direction of the side wall 3 of the outer groove without being offset.

Further, in the step of assembling the joint plate 9, the joint plate 9 is attached and assembled on the upper side of the previously assembled inner groove side plate 7, so that the inner groove side plate 7 which is not bent in the height direction is assembled into a ring shape. It is easier to assemble the joint plate 9 which is bent in the height direction than the joint plate 9 which is bent in the first direction, and thus the annular joint of the joint plate 9 can be easily assembled.

Also, before the step of assembling the inner groove, at the joint plate 9 A spacer holder 11 that protrudes outward from the joint support 10 is provided between the adjacent joint supports 10 of the outer peripheral surface. Therefore, even if the joint plate 9 is largely displaced in the horizontal direction by the influence of an earthquake or the like in the middle of lifting the joint plate 9 by the lifting device 19, the spacer member 11 can be collided with the supporting jack 50. The side wall 3 of the groove prevents the joint support 10 from directly colliding with the side wall 3. Thus, the joint support 10 or the joint plate 9 can be prevented from being damaged.

Although the preferred embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments described above. The shape, the combination, and the like of the respective constituent members shown in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the scope of the invention.

For example, in the above embodiment, the support jack 50 has been disposed on all of the plurality of joint supports 10, but the present invention is not limited to the method. For example, the support jacks 10 may be provided every other one of the joint supports 10 in the circumferential direction or at a plurality of times.

Further, the arrangement of the support jacks 50 to the joint support 10 can be arbitrarily set.

In the above-described embodiment, the plurality of leg stand 6 for supporting the inner groove side plate 7 is provided on the inner peripheral surface side of the side wall 3 of the outer groove at the time of assembly of the inner groove, but the present invention is not limited to this method. In other words, instead of using the foot stand 6, the base plate 1 is used, in particular, the bottom groove provided on the base plate 1 is used to support the inner groove. Side panel 7.

3‧‧‧Side wall of the outer groove (PC wall)

9‧‧‧ joint plate (joint part)

10‧‧‧ Joint support (joint reinforcement)

10a‧‧‧Support board

10b‧‧‧ Suspended plate (suspended part)

10c‧‧‧ reinforcing plate

10d‧‧‧ gap (suspended point)

10e‧‧‧ ribs

11‧‧‧ interval holder

11a‧‧‧H-beam

11b‧‧‧ steel plate

12‧‧‧ Roof skeleton

13‧‧‧ cable car track

50‧‧‧Supported jack

Claims (9)

A method for constructing a cylindrical groove having an inner groove and an outer groove, the method for constructing the cylindrical groove includes: a step of assembling a joint portion in which an annular joint portion is assembled inside the outer groove; and the joint portion a joint support setting step of arranging a plurality of joint supports in a circumferential direction; a support jack setting step of positioning the telescopic support jack opposite to a side wall of the outer groove and disposed on the joint support; and by a plurality of a lifting device that lifts the joint portion and raises it, and attaches the inner groove side plate to the lower side of the raised joint portion to assemble the inner groove; in the inner groove assembling step, When the joint portion is raised and raised, the support jack is extended to support between the side wall of the outer groove and the joint support, and the joint portion is fixed to the side wall of the outer groove. The method of constructing a cylindrical groove according to the first aspect of the invention, wherein in the joint support setting step, each joint support is provided to be connected to a suspended portion of the lift device; Before the step of assembling the inner tank, the method further comprises: attaching the plurality of lifting devices to the hanging portion, and connecting the lifting device to the suspended portion, wherein the hanging portion is disposed outside the outer portion The side wall of the trough is used to suspend the lifting device. The method for constructing a cylindrical groove according to the first or second aspect of the invention, wherein in the supporting jack setting step, the support jack is provided in each of the plurality of joint supports. The method of constructing a cylindrical groove according to the first or second aspect of the invention, wherein in the joint assembly step, the front side of the inner groove side plate assembled in an annular shape is previously attached and assembled. In the inner groove assembling step, the inner groove side plate is attached to the inner groove side plate on the lower side of the joint portion which is raised by the plurality of lifting devices. The method of constructing a cylindrical groove according to the third aspect of the invention, wherein in the joint assembly step, the joint portion is attached and assembled on an upper side of an inner groove side plate assembled in an annular shape; In the inner tank assembling step, the next inner groove side plate is attached to the inner groove side plate on the lower side of the joint portion which is raised by the plurality of lifting devices. The method for constructing a cylindrical groove according to the first or second aspect of the invention, wherein, before the step of assembling the inner groove, the joint support member adjacent to the outer circumferential surface of the joint portion is further provided In the meantime, a step of providing a spacer member that protrudes toward the radially outer side of the aforementioned groove from the joint support member is provided. The method for constructing a cylindrical groove according to the third aspect of the invention, wherein before the step of assembling the inner groove, the method further comprises: setting a ratio between the adjacent joint supports adjacent to the outer circumferential surface of the joint portion The joint support member is also stepped toward the radially outer side of the groove Step. The method for constructing a cylindrical groove according to the fourth aspect of the invention, wherein before the step of assembling the inner groove, the method further comprises: setting a ratio between the adjacent joint supports adjacent to the outer circumferential surface of the joint portion The joint support member also has a step of a spacer which protrudes toward the radially outer side of the aforementioned groove. The method for constructing a cylindrical groove according to the fifth aspect of the invention, wherein before the step of assembling the inner groove, the method further comprises: setting a ratio between the adjacent joint supports adjacent to the outer circumferential surface of the joint portion The joint support member also has a step of a spacer which protrudes toward the radially outer side of the aforementioned groove.